9-13 July 2012
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=11&confId=14"><font color=#ff0000>SAIP2012 PROCEEDINGS AVAILABLE</font></a>

Characterization of spectral broadening of femtosecond pulses in microstructured fiber

10 Jul 2012, 17:30
2h
IT Building

IT Building

Poster Presentation Track C - Photonics Poster Session

Speaker

Mr Wilfrid Ndebeka (Laser Research Institute, Physics Department, University of Stellenbosch)

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

PhD

Apply to be<br> consider for a student <br> &nbsp; award (Yes / No)?

Yes

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Main supervisor (name and email)<br>and his / her institution

Erich Rohwer (egr@sun.ac.za)
Laser Research Institute, University of Stellenbosch

Abstract content <br> &nbsp; (Max 300 words)

Recently it has been shown that all normal dispersion photonic crystal fibre (PCF) can be used for efficient coherent supercontinuum generation. A brief summary of the theoretical basis of this PCF design is presented. The experimental setup is discussed and results are presented. The spectral broadening of femtosecond laser pulses (λ = 800 nm, 75 fs, 80 MHz rep. rate) in a microstructured fiber (core diameter of 2.3 ± 0.3 µm) as a function of input energy is presented and the results are discussed for two different lengths of PCF (15 cm and 20 cm). High coupling efficiencies were achieved and typically spectral broadband output (630 nm – 1000 nm) was observed. The effect of laser polarization and strain of the fiber on the polarization of the supercontinuum output was investigated. By laterally stressing the fibre with a load, polarization selection of the output was achieved. A brief outlook on future work and potential applications are presented.

Primary author

Mr Wilfrid Ndebeka (Laser Research Institute, Physics Department, University of Stellenbosch)

Co-authors

Dr Alexander Heidt (Optoelectronics Research Centre, University of Southampton, United Kingdom) Prof. Erich Rohwer (Laser Research Institute, Physics Department, University of Stellenbosch) Mr Peter Baricholo (National University of Science and Technology, Department of Applied Physics, Bulawayo, Zimbabwe) Dr Pieter Neethling (Laser Research Institute, Physics Department, University of Stellenbosch)

Presentation Materials

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